if u r traveling from Mumbai to banglore and return
back .To find the speed of the car which of the following r
needed.
a)the distance between them.
b)time taken
c)avg speed towards Mumbai and the avg speed towards
banglore.
Choices:
1)a only. 2)a and b 3) a,b,c 4)b only 5) c only ( ans not
in order)
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Answer / animesh roy
the answer is 5)c only.
here is an example.
let the avg speed are 20 and 40 accordingly and dist
between them is x.
so total time required (x/20+x/40).and the total dist
covered is 2x.
so avg speed is 2x/(x/40+x/20)=80/3.
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